--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2012 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.browsing.ui.swt;\r
+\r
+import java.util.List;\r
+\r
+import org.eclipse.core.expressions.PropertyTester;\r
+import org.eclipse.jface.viewers.ISelection;\r
+import org.simantics.DatabaseJob;\r
+import org.simantics.Simantics;\r
+import org.simantics.browsing.ui.BuiltinKeys;\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.browsing.ui.common.node.IDeletable;\r
+import org.simantics.browsing.ui.common.node.IModifiable;\r
+import org.simantics.browsing.ui.common.node.IRefreshable;\r
+import org.simantics.browsing.ui.model.queries.IsNodeContextModifiable;\r
+import org.simantics.browsing.ui.model.queries.IsNodeContextRemovable;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.Session;\r
+import org.simantics.db.common.utils.RequestUtil;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.SelectionHints;\r
+import org.simantics.ui.SimanticsUI;\r
+import org.simantics.utils.ui.ISelectionUtils;\r
+\r
+/**\r
+ * A JFace property tester extension for the Eclipse command framework that is\r
+ * meant for working with {@link NodeContext} instances of the Simantics\r
+ * browsing framework.\r
+ * \r
+ * <p>\r
+ * This tester expects to receive IStructuredSelections that contain NodeContext\r
+ * instances.\r
+ * \r
+ * <p>\r
+ * It supports testing of the following properties:\r
+ * <ul>\r
+ * <li>nodeClass - tests if the {@link NodeContext} input (see\r
+ * {@link BuiltinKeys#INPUT}) is an instance of the class specified as an\r
+ * argument. The class must be given as a qualified class name.</li>\r
+ * <li>deletable - for testing whether a NodeContext can be considered\r
+ * generically deletable, see <code>org.eclipse.ui.edit.delete</code> command.\r
+ * No arguments required.</li>\r
+ * <li>modifiable - for testing whether a NodeContext can be considered\r
+ * generically modifiable (either in-line or not), see\r
+ * <code>org.eclipse.ui.edit.rename</code> command. No arguments required.</li>\r
+ * <li>refreshable - for testing whether a NodeContext can be considered\r
+ * generically refreshable, see <code>org.eclipse.ui.file.refresh</code>\r
+ * command. No arguments required.</li>\r
+ * </ul>\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class NodePropertyTester extends PropertyTester {\r
+\r
+ /**\r
+ * Tests if the received object within the model browser tree node is an\r
+ * instance of the class specified as the argument.\r
+ */\r
+ private static final String NODE_CLASS = "nodeClass";\r
+\r
+ /**\r
+ * Tests if the received object is considered deletable.\r
+ */\r
+ private static final String DELETABLE = "deletable";\r
+\r
+ /**\r
+ * Tests if the received object is considered modifiable.\r
+ */\r
+ private static final String MODIFIABLE = "modifiable";\r
+\r
+ /**\r
+ * Tests if the received object is considered refreshable.\r
+ */\r
+ private static final String REFRESHABLE = "refreshable";\r
+\r
+ ContextTester deletableTester = new DeletableTester();\r
+ ContextTester modifiableTester = new ModifiableTester();\r
+ ContextTester refreshableTester = new RefreshableTester();\r
+\r
+ @Override\r
+ public boolean test(final Object receiver, final String property, final Object[] args, final Object expectedValue) {\r
+// System.out.println("TEST: " + receiver + ", " + property + ", " + Arrays.toString(args) + ", " + expectedValue);\r
+ if (!(receiver instanceof ISelection))\r
+ return false;\r
+\r
+ List<NodeContext> ncs = ISelectionUtils.getPossibleKeys((ISelection) receiver, SelectionHints.KEY_MAIN, NodeContext.class);\r
+ \r
+ if (ncs.isEmpty())\r
+ return false;\r
+\r
+ if (NODE_CLASS.equals(property)) {\r
+ return testCollection(ncs, new NodeClassTester(args));\r
+ } else if (DELETABLE.equals(property)) {\r
+ return testCollection(ncs, deletableTester);\r
+ } else if (MODIFIABLE.equals(property)) {\r
+ if (ncs.size() == 1)\r
+ return testCollection(ncs, modifiableTester);\r
+ return false;\r
+ } else if (REFRESHABLE.equals(property)) {\r
+ return testCollection(ncs, refreshableTester);\r
+ }\r
+\r
+ return false;\r
+ }\r
+\r
+ static interface ContextTester {\r
+ boolean test(NodeContext c);\r
+ }\r
+\r
+ public static class NodeClassTester implements ContextTester {\r
+ Object[] args;\r
+ NodeClassTester(Object[] args) {\r
+ this.args = args;\r
+ }\r
+ @Override\r
+ public boolean test(NodeContext nc) {\r
+ try {\r
+ Object input = nc.getConstant(BuiltinKeys.INPUT);\r
+ Class<?> inputClass = input.getClass();\r
+// System.out.println("input: " + input);\r
+ boolean assignable = false;\r
+ for (Object o : args) {\r
+ Class<?> clazz = Class.forName((String) o, true, input.getClass().getClassLoader());\r
+// System.out.println(" ARG " + o + " CLAZZ: " + clazz);\r
+ if (clazz.isAssignableFrom(inputClass)) {\r
+// System.out.println(" assignable!");\r
+ assignable = true;\r
+ break;\r
+ }\r
+ }\r
+ return assignable;\r
+ } catch (ClassNotFoundException e) {\r
+ }\r
+ return false;\r
+ }\r
+ }\r
+\r
+ public static class DeletableTester implements ContextTester {\r
+ @Override\r
+ public boolean test(NodeContext nc) {\r
+ Object input = nc.getConstant(BuiltinKeys.INPUT);\r
+ if (input instanceof Resource) {\r
+ Session session = Simantics.peekSession();\r
+ try {\r
+ if (session != null && !DatabaseJob.inProgress())\r
+ return RequestUtil.trySyncRequest(\r
+ session,\r
+ SimanticsUI.UI_THREAD_REQUEST_START_TIMEOUT,\r
+ SimanticsUI.UI_THREAD_REQUEST_EXECUTION_TIMEOUT,\r
+ false,\r
+ new IsNodeContextRemovable( nc ) );\r
+ } catch (DatabaseException | InterruptedException e) {\r
+ }\r
+ return false;\r
+ } else if (input instanceof IDeletable) {\r
+ // OK, this is something that should be considered\r
+ // deletable, as long as we can find\r
+ // a method for performing the deletion.\r
+ return true;\r
+ }\r
+ return false;\r
+ }\r
+ }\r
+\r
+ public static class ModifiableTester implements ContextTester {\r
+ @Override\r
+ public boolean test(NodeContext nc) {\r
+ Object input = nc.getConstant(BuiltinKeys.INPUT);\r
+ if (input instanceof Resource) {\r
+ Session session = Simantics.peekSession();\r
+ try {\r
+ if (session != null && !DatabaseJob.inProgress())\r
+ return RequestUtil.trySyncRequest(\r
+ session,\r
+ SimanticsUI.UI_THREAD_REQUEST_START_TIMEOUT,\r
+ SimanticsUI.UI_THREAD_REQUEST_EXECUTION_TIMEOUT,\r
+ false,\r
+ new IsNodeContextModifiable( nc ) );\r
+ } catch (DatabaseException | InterruptedException e) {\r
+ }\r
+ return false;\r
+ } else if (input instanceof IModifiable) {\r
+ return true;\r
+ }\r
+ return false;\r
+ }\r
+ }\r
+\r
+ public static class RefreshableTester implements ContextTester {\r
+ @Override\r
+ public boolean test(NodeContext nc) {\r
+ return nc.getConstant(BuiltinKeys.INPUT) instanceof IRefreshable;\r
+ }\r
+ }\r
+\r
+ private boolean testCollection(List<NodeContext> receiver, ContextTester tester) {\r
+ if (receiver.isEmpty())\r
+ return false;\r
+\r
+ int fails = 0;\r
+ for (NodeContext nc : receiver) {\r
+ if (!tester.test(nc))\r
+ ++fails;\r
+ }\r
+ return fails > 0 ? false : true;\r
+ }\r
+\r
+}\r
Code Review / simantics / platform.git / blobdiff